Subtract 45/12 from 24/28
1st number: 24/28, 2nd number: 3 9/12
24/28 - 45/12 is -81/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
24/28 = 24 × 3/28 × 3 = 72/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
45/12 = 45 × 7/12 × 7 = 315/84 - Subtract the two like fractions:
72/84 - 315/84 = 72 - 315/84 = -243/84 - After reducing the fraction, the answer is -81/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/28-45/12 24/28-90/12 24/56-45/12 24/28-45/24 72/28-45/12 24/84-45/12 24/28-45/36 24/28-45/60 24/28-45/84